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The Rockport Mira
Loudspeakers
"Indeed, I’m hard-pressed to name
another speaker of this size and price that delivers the sheer
physical presence of a piano the way the Rockport Mira does."
"The
Rockport Mira’s
frequency extremes exhibit the same kind of uninhibited strength,
making it one of the most dynamically
balanced speakers of my
experience. A solo violin, such as Nathan Milstein’s [Bach Sonatas
and Partitas, DG LP], displays great quickness and agility, as do
instruments such as cymbals and the upper reaches of guitars."
"... be it
acoustic or electric bass, the concert drum used in Stravinsky’s Petruchka [Ansermet, Athena LP reissue],
or Roy Haynes’ kit on Analogue Productions fantastic sounding 45RPM edition
of Thelonious in Action, which will raise the hair on the back of your neck.
Check out his brief solo toward the conclusion of Monk’s “Evidence.” Even if
you’re lucky enough to hear live drums in an intimate environment (and it’s
hard to, given even the smallest venues’ obsession with amplification), it’s
easy to forget just how staggeringly loud and visceral a drum set can be. In
my small listening room, the Mira delivers that kind of thrilling percussive
pressure to the torso."
- Wayne Garcia, The Absolute Sound - Aug/Sept
2004
The Mira is at once seductively warm and rich,
yet it gives up little in terms of detail and openness.
Perhaps the Mira’s most notable strength, because it usually come
with only the most costly designs, is a dynamic energy in the
upper bass and lower treble regions that brings tricky instruments
such as drums, bass, brass, and strings to vivid life. The bottom
end has a lot of power, along with good texture and detail, while
the highs are airy, extended, and well integrated. (Reviewed by WG,
Issue 149)
Special Features -
Rockport Technologies Mira
- Wayne Garcia, The Absolute Sound - Aug/Sept 2004
Midrange
-
5.25", custom-designed midrange went through 23 different
iterations before the final design, which uses a mineral-filled poly-cone
with a sophisticated motor system built to Rockport’s specs by Denmark’s
Audio Technology. This handles frequencies from 140Hz–2.5kHz.
Features “Symmetric Drive,” to reduce
rise time by a factor of ten, resulting in greater linearity regardless of
the cone’s position. Moreover, “Symmetric Drive” is lowers
voice coil inductance, creating a more stable impedance and therefore
simpler crossover topology, making the speaker easier to drive for
high-impedance tube amps.
Tweeter - 1", Scan Speak Revelator motor system. Chosen for its low resonant
frequency (1.5–2kHz) and ability to deliver the natural body of instruments.
Woofers - 10" Danish-made Vifas. As with the $91,500 Hyperion, the
Mira’s 24dB-per-octave acoustic slope crossover is hand-built, and
point-to-point wired with custom film/foil caps (made exclusively for
Rockport), custom inductors, and Caddock resistors. All are spec’d at
1% tolerance, and the unit is epoxy-potted for mechanical stability as well
as reduced microphonics.
Wiring - Internally wired with Transparent
cable and connected via Cardas rhodium posts.
Enclosure - Danish-made enclosure of pure MDF. The front
baffle is 3"-thick and the walls are 1"-thick. Seven individual braces lock
the cabinet’s panels together, while at the same time creating separate
acoustic chambers for each driver. The side-firing woofer housing has a 2"
thick panel for the driver mounting surface and is rear-vented
“with deeply radiused edges to prevent port turbulence.” (Payor believes
that a properly designed vented enclosure allows for both lower driver
distortion and higher motor strength, and can couple to room boundaries as
well as sealed cabinets.)
The front-driver baffle uses a laser-cut
Steinway-felt insert to reduce reflections from the midrange and
high-frequency drivers. Long-fiber wool is used to damp the midrange
enclosure, and a mixture of anechoic wedge foam and polyster is found in the
bass cabinet.
Finish - high-gloss piano black
polyester, an eleven-step process performed by the same European company
that finishes Steinway grands.
Specifications - Rockport
Technologies Mira
Retail
Price: USD 16,999 (as at Oct 2005)
Floorstanding, 3-way vented loudspeaker
Driver complement: 1.1" soft-dome tweeter, 5.25" mid/bass driver, 10"
side-firing woofer
Frequency response: 30Hz–20kHz
Sensitivity: 88dB
Impedance: 4 ohms
Recommended amplifier power: 50 watts minimum
Dimensions: 10.25" x 44.75" x 19.5"
Weight: 115 lbs. each / 52.16 kg each
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